Linux system calls

System call                 Kernel        Notes
─────────────────────────────────────────────────────────────────────────
_llseek(2)                  1.2
_newselect(2)
_sysctl(2)
accept(2)
accept4(2)                  2.6.28
access(2)
acct(2)
add_key(2)                  2.6.11
adjtimex(2)
afs_syscall(2)                            Not implemented
alarm(2)
alloc_hugepages(2)          2.5.36        Removed in 2.5.44
bdflush(2)
bind(2)
break(2)                                  Not implemented
brk(2)
cacheflush(2)               1.2           Not on i386
capget(2)                   2.2
capset(2)                   2.2
chdir(2)
chmod(2)
chown(2)
chown32(2)                  2.4
chroot(2)
clock_getres(2)             2.6
clock_gettime(2)            2.6
clock_nanosleep(2)          2.6
clock_settime(2)            2.6
clone(2)
close(2)
connect(2)
creat(2)
create_module(2)
delete_module(2)
dup(2)
dup2(2)
dup3(2)                     2.6.27
epoll_create(2)             2.6
epoll_create1(2)            2.6.27
epoll_ctl(2)                2.6
epoll_pwait(2)              2.6.19
epoll_wait(2)               2.6
eventfd(2)                  2.6.22
eventfd2(2)                 2.6.27
execve(2)
exit(2)
exit_group(2)               2.6
faccessat(2)                2.6.16
fadvise64(2)                2.6
fadvise64_64(2)             2.6
fallocate(2)                2.6.23
fchdir(2)
fchmod(2)
fchmodat(2)                 2.6.16
fchown(2)
fchown32(2)                 2.4
fchownat(2)                 2.6.16
fcntl(2)
fcntl64(2)                  2.4
fdatasync(2)
fgetxattr(2)                2.6; 2.4.18

flistxattr(2)               2.6; 2.4.18
flock(2)                    2.0
fork(2)
free_hugepages(2)           2.5.36        Removed in 2.5.44
fremovexattr(2)             2.6; 2.4.18
fsetxattr(2)                2.6; 2.4.18
fstat(2)
fstat64(2)                  2.4
fstatat64(2)                2.6.16
fstatfs(2)
fstatfs64(2)                2.6
fsync(2)
ftime(2)                                  Not implemented
ftruncate(2)
ftruncate64(2)              2.4
futex(2)                    2.6
futimesat(2)                2.6.16
get_kernel_syms(2)
get_mempolicy(2)            2.6.6
get_robust_list(2)          2.6.17
get_thread_area(2)          2.6
getcpu(2)                   2.6.19
getcwd(2)                   2.2
getdents(2)                 2.0
getdents64(2)               2.4
getegid(2)
getegid32(2)                2.4
geteuid(2)
geteuid32(2)                2.4
getgid(2)
getgid32(2)                 2.4
getgroups(2)
getgroups32(2)              2.4
getitimer(2)
getpeername(2)
getpagesize(2)              2.0           Not on i386
getpgid(2)
getpgrp(2)
getpid(2)
getpmsg(2)                                Not implemented
getppid(2)
getpriority(2)
getresgid(2)                2.2
getresgid32(2)              2.4
getresuid(2)                2.2
getresuid32(2)              2.4
getrlimit(2)
getrusage(2)
getsid(2)                   2.0
getsockname(2)
getsockopt(2)
gettid(2)                   2.4.11
gettimeofday(2)
getuid(2)
getuid32(2)                 2.4
getxattr(2)                 2.6; 2.4.18
gtty(2)                                   Not implemented
idle(2)                                   Not implemented
init_module(2)
inotify_add_watch(2)        2.6.13
inotify_init(2)             2.6.13
inotify_init1(2)            2.6.27
inotify_rm_watch(2)         2.6.13
io_cancel(2)                2.6
io_destroy(2)               2.6

io_getevents(2)             2.6
io_setup(2)                 2.6
io_submit(2)                2.6
ioctl(2)
ioperm(2)
iopl(2)
ioprio_get(2)               2.6.13
ioprio_set(2)               2.6.13
ipc(2)
kexec_load(2)               2.6.7
keyctl(2)                   2.6.11
kill(2)
lchown(2)                   2.2
lchown32(2)                 2.4
lgetxattr(2)                2.6; 2.4.18
link(2)
linkat(2)                   2.6.16
listen(2)
listxattr(2)                2.6; 2.4.18
llistxattr(2)               2.6; 2.4.18
lock(2)                                   Not implemented
lookup_dcookie(2)           2.6
lremovexattr(2)             2.6; 2.4.18
lseek(2)
lsetxattr(2)                2.6; 2.4.18
lstat(2)
lstat64(2)                  2.4
madvise(2)                  2.4
madvise1(2)                 2.4
mbind(2)                    2.6.6
migrate_pages(2)            2.6.16
mincore(2)                  2.4
mkdir(2)
mkdirat(2)                  2.6.16
mknod(2)
mknodat(2)                  2.6.16
mlock(2)
mlockall(2)
mmap(2)
mmap2(2)                    2.4
modify_ldt(2)
mount(2)
move_pages(2)               2.6.18
mprotect(2)
mpx(2)                                    Not implemented
mq_getsetattr(2)            2.6.6
mq_notify(2)                2.6.6
mq_open(2)                  2.6.6
mq_timedreceive(2)          2.6.6
mq_timedsend(2)             2.6.6
mq_unlink(2)
mremap(2)                   2.0
msgctl(2)
msgget(2)
msgrcv(2)
msgsnd(2)
msync(2)                    2.0
munlock(2)
munlockall(2)
munmap(2)
nanosleep(2)                2.0
nfsservctl(2)               2.2
nice(2)
oldfstat(2)
oldlstat(2)

oldolduname(2)
oldstat(2)
olduname(2)
open(2)
openat(2)                   2.6.16
pause(2)
pciconfig_iobase(2)         2.2.15; 2.4   Not on i386
pciconfig_read(2)           2.0.26; 2.2   Not on i386
pciconfig_write(2)          2.0.26; 2.2   Not on i386
perf_event_open(2)          2.6.31        Was called perf_counter_open()
in 2.6.31; renamed in 2.6.32
personality(2)              1.2
phys(2)                                   Not implemented
pipe(2)
pipe2(2)                    2.6.27
pivot_root(2)               2.4
poll(2)                     2.2
ppoll(2)                    2.6.16
prctl(2)                    2.2
pread64(2)                                Added as "pread" in 2.2;
renamed "pread64" in 2.6
preadv(2)                   2.6.30
prof(2)                                   Not implemented
profil(2)                                 Not implemented
pselect6(2)                 2.6.16
ptrace(2)
putpmsg(2)                                Not implemented
pwrite64(2)                               Added as "pwrite" in 2.2;
renamed "pwrite64" in 2.6
pwritev(2)                  2.6.30
query_module(2)             2.2
quotactl(2)
read(2)
readahead(2)                2.4.13
readdir(2)
readlink(2)
readlinkat(2)               2.6.16
readv(2)                    2.0
reboot(2)
recv(2)
recvfrom(2)
recvmsg(2)
recvmmsg(2)                 2.6.33
remap_file_pages(2)         2.6
removexattr(2)              2.6; 2.4.18
rename(2)
renameat(2)                 2.6.16
request_key(2)              2.6.11
restart_syscall(2)          2.6
rmdir(2)
rt_sigaction(2)             2.2
rt_sigpending(2)            2.2
rt_sigprocmask(2)           2.2
rt_sigqueueinfo(2)          2.2
rt_sigreturn(2)             2.2
rt_sigsuspend(2)            2.2
rt_sigtimedwait(2)          2.2
rt_tgsigqueueinfo(2)        2.6.31
sched_get_priority_max(2)   2.0
sched_get_priority_min(2)   2.0
sched_getaffinity(2)        2.6
sched_getparam(2)           2.0
sched_getscheduler(2)       2.0
sched_rr_get_interval(2)    2.0
sched_setaffinity(2)        2.6

sched_setparam(2)           2.0
sched_setscheduler(2)       2.0
sched_yield(2)              2.0
security(2)                               Not implemented
select(2)
semctl(2)
semget(2)
semop(2)
semtimedop(2)               2.6; 2.4.22
send(2)
sendfile(2)                 2.2
sendfile64(2)               2.6; 2.4.19
sendmsg(2)
sendto(2)
set_mempolicy(2)            2.6.6
set_robust_list(2)          2.6.17
set_thread_area(2)          2.6
set_tid_address(2)          2.6
set_zone_reclaim(2)         2.6.13        Removed in 2.6.16 (was never
available to userspace)
setdomainname(2)
setfsgid(2)                 1.2
setfsgid32(2)               2.4
setfsuid(2)                 1.2
setfsuid32(2)               2.4
setgid(2)
setgid32(2)                 2.4
setgroups(2)
setgroups32(2)              2.4
sethostname(2)
setitimer(2)
setpgid(2)
setpriority(2)
setregid(2)
setregid32(2)               2.4
setresgid(2)                2.2
setresgid32(2)              2.4
setresuid(2)                2.2
setresuid32(2)              2.4
setreuid(2)
setreuid32(2)               2.4
setrlimit(2)
setsid(2)
setsockopt(2)
settimeofday(2)
setuid(2)
setuid32(2)                 2.4
setup(2)                                  Removed in 2.2
setxattr(2)                 2.6; 2.4.18
sgetmask(2)
shmat(2)
shmctl(2)
shmdt(2)
shmget(2)
shutdown(2)
sigaction(2)
sigaltstack(2)              2.2
signal(2)
signalfd(2)                 2.6.22
signalfd4(2)                2.6.27
sigpending(2)
sigprocmask(2)
sigreturn(2)
sigsuspend(2)
socket(2)

socketcall(2)
socketpair(2)
splice(2)                   2.6.17
spu_create(2)               2.6.16        PowerPC only
spu_run(2)                  2.6.16        PowerPC only
ssetmask(2)
stat(2)
stat64(2)                   2.4
statfs(2)
statfs64(2)                 2.6
stime(2)
stty(2)                                   Not implemented
swapoff(2)
swapon(2)
symlink(2)
symlinkat(2)                2.6.16
sync(2)
sync_file_range(2)          2.6.17
sysfs(2)                    1.2
sysinfo(2)
syslog(2)
tee(2)                      2.6.17
tgkill(2)                   2.6
time(2)
timer_create(2)             2.6
timer_delete(2)             2.6
timer_getoverrun(2)         2.6
timer_gettime(2)            2.6
timer_settime(2)            2.6
timerfd_create(2)           2.6.25
timerfd_gettime(2)          2.6.25
timerfd_settime(2)          2.6.25
times(2)
tkill(2)                    2.6; 2.4.22
truncate(2)
truncate64(2)               2.4
tuxcall(2)                                Not implemented
ugetrlimit(2)               2.4
ulimit(2)                                 Not implemented
umask(2)
umount(2)
umount2(2)                  2.2
uname(2)
unlink(2)
unlinkat(2)                 2.6.16
unshare(2)                  2.6.16
uselib(2)
ustat(2)
utime(2)
utimensat(2)                2.6.22
utimes(2)                   2.2
vfork(2)
vhangup(2)
vm86old(2)
vmsplice(2)                 2.6.17
vserver(2)                                Not implemented
wait4(2)
waitid(2)                   2.6.10
waitpid(2)
write(2)
writev(2)                   2.0